TBH I've never been on a student council, I had the opportunity to become head boy in Year 12 but I decided against it because it was too much of a responsibility and title from how little I would gain from it though lol. When I was sent to boarding school for 2 years I eventually got onto the supplies detail (I was responsible for stuff like brooms, mops, paper towels, toilet paper, ect) and occasionally we'd meet up with the supply sergeants of each of the other blocks and contribute ideas and discuss, well, supplies. Realistically I only took the position because it meant I didn't have to help scrub the bathrooms and floors every morning and I could sleep in late.
My advice to you would be to know exactly what your responsibilities are and contribute ideas when you have meetings. If you don't know what you're doing and you're not actually doing anything you'll catch flak. If your responsibilities really are just "deciding time and dates" then I can't imagine you're ever going to forget up that bad kek
(it was a joke, friend)